Mainframe Network Admin

TechDigital Group; Town of Texas (WI); Hybrid; USD 90,000 - 150,000; Full time

Job summary

TechDigital Group is seeking a Mainframe Network Administrator to manage, support, and modernize the mainframe networking environment, including VTAM, NCP, SNA, and TCP/IP. You will design, configure, and support the mainframe network infrastructure and troubleshoot session-level connectivity, with migration leadership for tools and platforms.

The role emphasizes planning cutover/rollback strategies, ensuring security/compliance, and providing L2/L3 support on rotation, while coordinating with

Qualifications

• 8+ years hands-on mainframe networking experience.
• Strong knowledge of SNA and TCP/IP protocols.
• Experience with CA TPX and CL/SuperSession configuration.
• Ability to lead end-to-end migrations and handle cutover planning.

Responsibilities

• Lead migration of session management and networking tools.
• Configure CA-TPX and CL/SuperSession for routing and access.
• Plan, test, and implement cutover and rollback strategies.
• Provide L2/L3 support and on-call rotation.

Skills

Mainframe networking

SNA/TCP-IP protocols

Session management

Migration planning

VTAM/NCP/z/OS

Troubleshooting

Stakeholder communication

End-to-end migrations

Tools

CA TPX

CL/SuperSession

NCP

z/OS

Job description

Mainframe Network administrator

Position Description:

The Mainframe Network administrator will manage, support, and modernize the mainframe networking environment. The applicant will design, configure, and support mainframe network infrastructure including VTAM, NCP, SNA, and TCP/IP, and will troubleshoot session-level connectivity and session management functions using CA TPX, CL/SuperSession and related tools. Excellent communication skills are required; previous session management migration experience is a plus.

The candidate will lead and execute the migration of session management and networking tools to updated or consolidated platforms, ensuring session continuity and minimal business disruption. Duties include configuring CA-TPX, CL/SuperSession for session routing, security, and user access; planning, testing, and implementing cutover and rollback strategies; coordinating timelines, dependencies, and risk mitigation with vendor teams and internal stakeholders; monitoring session performance pre/post-migration; and maintaining configuration and procedure documentation. The role also ensures security, audit, and regulatory compliance and provides L2/L3 support on an on-call rotation.

Required Skills:

• 8+ years of hands-on mainframe networking
• Strong expertise in SNA and TCP/IP protocols
• CA TPX, CL/SuperSession configuration, administration, session routing and troubleshooting
• Session management tool and network software migration
• Session continuity and cutover/rollback planning
• VTAM, NCP, Communications Server for z/OS
• Troubleshooting, documentation and stakeholder communication
• Able to lead migrations end-to-end, including validation

Desired Skills:

• z/OS and related mainframe operating environments
• High expertise in handling tools like CA TPX and CL/Supersession
• Migrating to CL/SuperSession from other platforms
• Network security protocols and compliance frameworks

Additional or Advantageous Skills:

• BFSI, healthcare or large enterprise mainframe estates
• Vendor tool transition and vendor coordination
• L2/L3 support and on-call rotation8+ years hands-on mainframe networking
• Strong expertise in SNA and TCP/IP protocols
• CA TPX, CL/SuperSession configuration, administration, session routing and troubleshooting
• VTAM, NCP, Communications Server for z/OS
• Able to lead migrations end-to-end, including validation
• z/OS and related mainframe operating environments
• High expertise in handling tools like CA TPX and CL/Supersession
• Migrating to CL/SuperSession from other platforms